# Evaluate Model: Claude Code March 2026 Update: Sonnet 4.6, Auto Mode & Computer Control
## What This Is
Anthropic has updated Claude Code, allowing it to control a computer to perform tasks like opening files and using developer tools. This new 'auto mode' lets the AI work more autonomously, supported by a more powerful model (Sonnet 4.6) that can better plan complex tasks and learn from past interactions.
Source: https://techcrunch.com/2026/03/24/anthropic-hands-claude-code-more-control-but-keeps-it-on-a-leash/
## Before You Start
Scan my workspace and analyze:
- The project language, framework, and current AI integrations
- Existing AI provider config (check .env, .env.local, config files for API keys — OpenRouter, OpenAI, Anthropic, Google AI, etc.)
- Which AI models I currently use and for what purposes
Then ask me before proceeding:
1. Am I interested in evaluating this model for my project, or just want a summary of what it offers?
2. If I want to try it — which part of my current AI stack should it replace or complement?
## Source Access Note
The source URL (https://techcrunch.com/2026/03/24/anthropic-hands-claude-code-more-control-but-keeps-it-on-a-leash/) may not be directly accessible from the terminal. Use the Reference Implementation and Additional Context sections below instead. If you need more details, ask me to paste relevant content from the source.
## What to Implement
This is a **New AI Model** — a model release, update, or capability announcement.
- Analyze the best use cases for this model within my project and current AI stack
- Compare its strengths, pricing, and context window against whatever I currently use
- Give me a clear, convincing argument for why this model would (or would not) be a good fit for my project
- If I want to try it: update my API configuration (provider, model ID, any new parameters) to point to this model
- If it requires a new API key or provider signup, tell me exactly what to do
## Additional Context
- Analyze the features introduced in the Claude Code March 2026 update, including 'computer use', 'auto mode', and the capabilities of the new Sonnet 4.6 model.
- Evaluate the user's current project codebase and CLAUDE.md configuration to identify workflows that would benefit from autonomous computer control, auto-planning, or the improved coding and reasoning of Sonnet 4.6.
- Propose a configuration update to the user's MCP settings to leverage Sonnet 4.6. If the user approves, draft an initial plan for a complex task that utilizes the new 'auto-plan' and 'computer use' capabilities in a sandboxed environment.
## Guidelines
- Adapt everything to my existing project — do not assume a specific stack or directory layout
- Use whichever AI provider I already have configured; if I need a new one, tell me what to sign up for and I'll give you the key
- Check my .env files for existing API keys (OpenRouter, OpenAI, Anthropic, Google AI) before asking me to add one
- Review any fetched code for safety before installing or executing it
- After setup, run a quick verification and show me a summary of exactly what was installed, where, and how to use it